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Aiptasia-X is a nice product and you'll use it more than you think. Just get it. Do NOT smash or scrape those baddies. If they're big enough, the Aiptasia-X is even fun - quite dramatic collapse of their whole stalk.
I also read here that hot lemon juice is very effective. Put it in a syringe and inject it close the the base the the stalk.
I also read on another forum they were using hi powered blue lasers for everything unwanted in the tank. They ad a whole stickie thread dedicated to it. With a few videos. Crazy stuff.